The ornamental design for a multi-hinged, convertible greenhouse, as shown and described.
FIG. 1 is a front perspective view of a multi-hinged, convertible green house in a fully closed position showing my new design;
FIG. 2 is a front perspective view thereof in a partially open position;
FIG. 3 is a front perspective view thereof in a fully open position;
FIG. 4 is a first end elevation view of the partially open end of FIG. 2;
FIG. 5 is an opposite end elevation view of the fully closed end of FIG. 2;
FIG. 6 is a rear elevation view of the partially open FIG. 2;
FIG. 7 is a front elevation view of the partially open FIG. 2; and,
FIG. 8 is a top plan view in the fully closed position of FIG. 1.
The broken line showing of a garden plot and stipple marks representing soil in FIGS. 1 and 2 are included for the purpose of showing environmental context for the multi-hinged, convertible greenhouse and form no part of the claimed design.